研究电动汽车内部声音质量的特点及其动态主动控制系统设计和开发在加速驾驶条件下
Shuai Zhang1, Yipeng Li1, Hang Jiang1
1College of Vehicle and Traffic Engineering, Henan University of Science and Technology, Luoyang, China.
PloS one
|April 1, 2024
概括
这项研究开发了电动汽车 (EV) 的动态主动声音控制系统,以提高加速过程中的内部声音质量. 该系统通过减少不必要的电机噪音和声音清晰度来改善动力和舒适感.
科学领域:
- 声学和汽车工程 声学和汽车工程
- 信号处理用于噪声控制
背景情况:
- 电动汽车 (EV) 在加速过程中往往缺乏理想的内部声音品质,例如动力和舒适感.
- 问题包括低感知功率,不适,电机电磁激发噪声,以及电动汽车的过度声音清晰度.
- 与燃油车辆 (FV) 的比较显示,在加速过程中有明显的声音频谱特征.
研究的目的:
- 为电动汽车设计和实施动态主动声音控制系统,以在加速驾驶条件下改善室内声音质量.
- 为应对电动汽车内部低功耗感觉,舒适度,电机噪音和声音清晰度等特定挑战.
- 为了提高电动汽车乘客在加速过程中的整体听觉体验.
主要方法:
- 在加速过程中对EV和FV之间的声音频谱特征进行比较分析.
- 利用短时间里埃转换 (STFT) 来提取和合成发动机声音.
- 分析了发动机排序组成和频域能量分布对车辆声音质量的影响.
- 开发并实施了动态主动声音控制系统,包括软件和硬件.
主要成果:
- 在加速过程中显著改善了电动汽车内部声音的舒适性和功率.
- 达到了目标室内声音水平达到要求.
- 增加了声压水平和声音强度,同时将声音清晰度降低了高达1.0度.
结论:
- 设计的动态主动声音控制系统有效地提高了在加速过程中电动汽车的内部声音质量.
- 该系统成功地解决了电机噪音和声音清晰度等关键问题,提高了乘客的舒适度和感知功率.
- 真实车辆测试验证了系统的性能及其满足所需声学标准的能力.
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